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7; The Expert Analysis System Interface (EASI) 
PERCEPTRON has spent several man-years developing the user 
interface that I have just described. 3 
EASI is: 
A HIGH-LEVEL USER LANGUAGE (BASIC LOOK-ALIKE) 
APPLICATION INDEPENDENT 
SPECIALIZED FOR INTERACTIVE SCIENTIFIC ANALYSIS 
A SINGLE SYNTAX USER INTERFACE 
A PROGRAMMABLE INTERFACE 
DESIGNED FOR DIRECT-TO-ANALYST USAGE 
MODIFIABLE WITHOUT REGARD TO THE APPLICATION 
PROGRAMS IT HOSTS 
EASI provides: 
— DEFINING AND CHECKING OF PARAMETERS 
- EXAMINING AND EDITING OF PARAMETERS 
- MULTI-LINGUAL MENUING AND PROMPTING 
- A BASIC EDITOR SUBSET 
— A PROCEDURE WORASPACE WITH LOAD AND SAVE 
- NESTING OF PROCEDURES (INCLUDING RECURSION) 
— CONDITIONAL TESTING, BRANCHING 
- LOCAL ARITHMETIC 
- HISTORY LOGGING 
—- AUTOMATION OF ON-LINE HELP 
— SPAWNING OF APPLICATION TASKS 
— INTERACTIVE AND FOREGROUND MODES 
— BACKGROUND AND BATCH MODES 
EASI’s optional, FORTRAN, programmer support library. 
IMP, provides: 
A SINGLE CALL TO GATHER ALL NECESSARY PARAMETER 
FROM THE DATA DICTIONARY 
- CALLS TO READ AND WRITE PARAMETER VALUES FROM AND 
TO THE DATA DICTIONARY 
- INTERFACE INTO EAGI'S MENU/PROMPT CAPABILITIES 
- AUTOMATIC ASSIGNMENT OF LUNS FOR ALL PERIPHERALS 
- PROGRAMMER ERROR HANDLING ROUTINES 
— SEMI-AUTOMATIC OVERLAYING (RSX-11M ONLY)